Chair



FIG. 1 is a front view of a chair comprising the new design, broken lines shown are for illustrative purposes only and form no part of the claimed design;

FIG. 2 is a left side view thereof, the right side view being a mirror image thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a perspective view thereof. 

The ornamental design for a chair, as shown and described. 